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Patients who have received any chemotherapy for advanced disease more than 8 weeks prior to enrollment to this OCS will not be eligible. A total of approximately 1,250 patients will be enrolled. Approximately 150 study sites will be activated in order to achieve complete enrollment by December 2010.

Progression free survival was defined as the time from enrollment to progression or death of any cause, whichever came first. The disease response status was assessed by the investigator according to the method of his or her choice. The choices included computed tomography (CT) scan, magnetic resonance imaging (MRI), bone scan, X-ray, Positron emission tomography (PET) or CT PET, physical exam, laboratory exam, and other method.

Secondary Outcome Measures:

Overall Survival [ Time Frame: Approximately 4.5 years ]

Overall survival was defined as the time from enrolment to death of any cause.

Number of Participants With Tumor Response [ Time Frame: Approximately 4.5 years ]

The tumor response was measured as complete response, partial response, stable disease, progressive disease, or clinical deterioration based on their best overall response. The tumor response was assessed by the investigator according to the method of his or her choice. The choices included computed tomography (CT) scan, magnetic resonance imaging (MRI), bone scan, X-ray, Positron emission tomography (PET) or CT PET, physical exam, laboratory exam, and other method.

Number of Hormone Receptor-positive Participants Who Initiated Cytotoxic Chemotherapy Following Discontinuation [ Time Frame: Approximately 4.5 years ]

Participants were assessed quarterly for progressive events and treatment status.

Number of Participants With Any Adverse Events, Any Serious Adverse Events, Any AEs Leading to Early Treatment Discontinuation, and Adverse Events Leading to Hospitalization or Death [ Time Frame: Approximately 4.5 years ]

An Adverse Event (AE) is defined as any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered to be related to the medicinal product. An Serious Adverse Events (SAE) is any untoward medical occurrence that, at any dose, results in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or results in a congenital anomaly/birth defect.

Number of Participants With Arterial Thromboembolic Events, Venous Thromboembolic Events, Left Ventricular Systolic Dysfunction, and Peripheral Neuropathy [ Time Frame: Approximately 4.5 years ]

Eligible participants with HER2-negative disease who received their first cytotoxic chemotherapy and/or targeted therapy were observed until death, withdrawal of consent, loss to follow-up, or until study closure, whichever was sooner (approximately 4.5 years).

Hormonal Therapy Cohort

Eligible participants with hormone receptor positive disease who received their first hormonal therapy for advanced disease were observed until death, withdrawal of consent, loss to follow-up, or until study closure, whichever was sooner (approximately 4.5 years).

Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:

Child, Adult, Senior

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

No

Sampling Method:

Non-Probability Sample

Study Population

Breast cancer clinic

Criteria

Inclusion Criteria:

Signed Informed Consent Form

Locally recurrent or metastatic breast cancer

Receipt of first systemic cytotoxic chemotherapy and/or targeted therapy among those with HER2-negative disease or first hormone therapy among those with HR-positive disease for the treatment of locally recurrent or metastatic disease, within 8 weeks prior to enrollment

Exclusion Criteria

Any medical condition, including mental illness or substance abuse, deemed by the investigator to be likely to interfere with a patient's ability to provide informed consent or comply with the treatment

Any prior chemotherapy started more than 8 weeks prior to enrollment for the treatment of locally recurrent or for metastatic breast cancer

Concurrent participation only in a blinded clinical trial

Contacts and Locations

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00726661